This product is a natural formulation of beneficial aquarium bacteria, which will eliminate fish wastes, excess fish food, toxic ammonia & nitrite, problem-causing nitrate & phosphate, as well as odors in aquarium water. It reduces the number of yearly water changes needed to keep gravel clean, by biologically eliminating the organic wastes that accumulate in the gravel. This natural formulation will safely create a healthy and crystal clear aquarium for you and your fish.